trip out v.1
1. [1960s+] to experience a hallucinogenic drug or a simulacrum thereof; also fig. use.
2. in fig. or ext. uses of sense 1.
(a) [1960s+] to lose control, to leave normality.
(b) [1960s+] to strike one as funny, crazy, extraordinary or amazing.
(c) [1970s+] to obsess or fantasize about.
(d) [1980s+] to be amazed, delighted.
(e) [1990s+] to feel confused.
(f) [1990s+] to confuse, to render someone emotionally unstable, to perturb.